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NASA Scientists Reveal New Information on Mars’ Formation and Evolution, Claim The Red Planet has a Porous Crust

NASA scientists claim the new revelations could help them better understand the interior structure and evolution of Mars

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Access Mars
Google collaborated with NASA to produce Access Mars that lets users wander the actual dunes and valleys explored by NASA's Curiosity rover.. Wikimedia
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Washington, Septemeber 15, 2017 : Mars’s crust is not as dense as previously thought and a lower density likely means that at least part of the Red Planet’s crust is relatively porous, says a new NASA study.

The findings, published in the journal Geophysical Research Letters, provide researchers clue that could help them better understand the interior structure and evolution of Mars.

“The crust is the end-result of everything that happened during a planet’s history, so a lower density could have important implications about Mars’s formation and evolution,” said study lead author Sander Goossens of NASA’s Goddard Space Flight Center in Greenbelt, Maryland.

The researchers mapped the density of the Martian crust, estimating the average density is 2,582 kgs per metre cubed. That’s comparable to the average density of the lunar crust.

Typically, Mars’s crust has been considered at least as dense as Earth’s oceanic crust, which is about 2,900 kgs per metre cubed.

The new value is derived from Mars’s gravity field, a global model that can be extracted from satellite tracking data using sophisticated mathematical tools.

Previous estimates relied more heavily on studies of the composition of Mars’s soil and rocks.

ALSO READ NASA Mars rover to Study an ancient fluid-carved valley incised on the inner slope of a vast crater’s r

“As this story comes together, we’re coming to the conclusion that it’s not enough just to know the composition of the rocks,” study co-author Greg Neumann, a planetary geologist at Goddard, said.

“We also need to know how the rocks have been reworked over time,” Neumann said.

Goossens and colleagues started with the same data used for an existing gravity model but put a new twist on it by coming up with a different constraint and applying it to obtain the new solution.

A constraint compensates for the fact that even the best data sets can’t capture every last detail.

Instead of taking the standard approach, known to those in the field as the Kaula constraint, the team created a constraint that considers the accurate measurements of Mars’s elevation changes, or topography.

“With this approach, we were able to squeeze out more information about the gravity field from the existing data sets,” said Goddard geophysicist Terence Sabaka.  (IANS)

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Emmy Awards 2018: NASA Nominated for Stunning Footage of Cassini voyage to Saturn

The Emmy Awards nominations have turned out to be more diverse than last year

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The Primetime Emmys will be awarded by the ATAS in Los Angeles on September 17.
The Primetime Emmys will be awarded by the ATAS in Los Angeles on September 17. Flickr

The Academy of Television Arts and Sciences (ATAS) has nominated NASA’s Jet Propulsion Laboratory (JPL) for Outstanding Original Interactive Program for its coverage of the Cassini mission’s Grand Finale at Saturn.

The Primetime Emmys will be awarded by the ATAS in Los Angeles on September 17.

The Creative Arts Emmys, which include interactive awards, will be presented during a separate ceremony on September 15 at the Microsoft Theatre in Los Angeles, NASA said in a statement on Friday.

In 2017, after nearly 20 years in space and 13 years revealing the wonders of Saturn, NASA’s Cassini orbiter was running out of fuel. As a final act, Cassini began a whole new mission — its Grand Finale, where it journeyed into the unknown and ended with a spectacular plunge into the planet.

Cassini’s first, daring dive into the unexplored space between the giant planet and its rings kicked off the campaign on April 26 in 2017.

NASA's stunning footage of Cassini lands Emmy nomination
NASA’s stunning footage of Cassini lands Emmy nomination. Pixabay

It culminated on September 15, 2017, with live coverage of Cassini’s plunge into Saturn’s atmosphere, with the spacecraft sending back science to the very last second.

JPL created a multi-month digital campaign to celebrate the mission’s science and engineering accomplishments and communicate why the spacecraft must meet its end in the skies of Saturn.

The multi-faceted campaign included regular updates on Twitter, Facebook, Snapchat, Instagram and the Cassini mission website, multiple live social, web and TV broadcasts during which reporter and public questions were answered.

Also Read: NASA Juno Data Indicate Another Possible Volcano on Jupiter Moon Io

A dramatic short film to communicate the mission’s story and preview its endgame; multiple 360-degree videos, including NASA’s first 360-degree livestream of a mission event from inside JPL mission control.

The Emmy Awards nominations have turned out to be more diverse than last year. Fantasy drama “Game of Thrones” has earned 22 nominations for the coveted Awards, while HBO’s 17-year streak as the most nominated network has been broken by Netflix. (IANS)